<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			/* ul {
				margin: 0;
				padding: 0;
			}
			div {
				margin: 0;
				padding: 0;
			} */
			ul,div {
				margin: 0;
				padding: 0;
			}
			
			.style {
				width: 200px;
				height: 200px;
				background-color: blue;
			} 
		</style>
	</head>
	<body>
		<div class="style"></div>
		<ul>
			<li>北京</li>
			<li>上海</li>
		</ul>
	</body>
</html>
